The systematic position of Plagiochila moritziana, P-trichostoma, and P-deflexa based on ITS sequence variation of nuclear ribosomal DNA, morphology, and lipophilic secondary metabolites

J Heinrichs, H Groth, I Holz, D S RyCroft, C Renker, Thomas Pröschold

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According to phylogenetic analyses of nrDNA ITS1 and ITS2 sequences (including the 5.8S unit) the Neotropical Plagiochila moritziana, P rutilans var. rutilans, P rutilans var. standleyi, P trichostoma (= P. permista, syn. nov.), and P. subtrinitensis form a monophyletic lineage and are placed in P. sect. Rutilantes; all five taxa lack a ca 20 base pair sequence that is present in all the taxa of the other Plagiochila sections investigated. The Central American P subtrinitensis is treated as a synonym of the Hawaiian endemic P deflexa. Plagiochila moritziana is excluded from sect. Fuscoluteae and reduced to a variety of P. rutilans; P. sect. Permistae is treated as a synonym of P. sect. Rutilantes. The sporophytes of P. trichostoma and P. deflexa are described for the first tune. Fresh material of R rutilans var. moritziana exhibits a distinct odor of peppermint caused by the presence of several menthane monoterpenoids, principally, pulegone. The Central American P rutilans var. standleyi is reported from Ecuador, new to South America. Lectotypes are designated for P rutilans var. moritziana, P subtrinitensis. and P trichostoma.
Original languageEnglish
Pages (from-to)189-203
Number of pages15
Issue number2
Publication statusPublished - 2002



  • CARL
  • Plant Sciences

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